Ensoniq EPS 16 Schematics

[davetech]

troubleshooting ?

It is really hard to find those but there are people with tons of knowledge on the ensoniq brand. There is a yahoo user group with a few guys that worked for ensoniq back in the day as well as users that have REed the boards.

Most if not all of ensoniq's repairs were board replacement. Then the ensoniq technician would repair the defective board and it would go back into stock. This is why the service manuals are set up the way they are.

HTH
dave

[suchenderxxx]

thanks. but the ensoniq group is kinda closed. not possible to post there anymore.

[Starspawn]

Im assuming this isnt the well known keyboard calibration issue?
Or disk drive?

I recommend contacting this guy: Home
And these: Home - Route 66 Studios

[apprenticemart2]

You wont find the service manual for free on the web.
Do you have an EPS or an EPS-16 plus?

You will have to pay for a manual, but how much useful information it will contain I don't know.

Try here bottom of the page.

Books and Manuals for the Ensoniq ASR, EPS and EPS-16 Plus Samplers

There is a little bit of info here

thoralt.de

[davetech]

Originally Posted by suchenderxxx

thanks. but the ensoniq group is kinda closed. not possible to post there anymore.

yeah,i just saw that myself after i posted and went there for an update.
you can still look through the history and contact some of the members though.



what is the reason you need it, if you dont mind me asking. i was told by thesoniq that they dont exist but i didn't believe him because he used to work there so he has some. he has a website thesoniq got com or gogle him.


dave

[suchenderxxx]

my displayboard is dead. and the psu was dead i had a short on the eps 16. But i got it fixed half way now. one of the diodes on the psuboard was dead. psu is working now, only need to fix the displayboard now. I will get a spare soon. Thanks guys for all your response.

thesoniq i wrote him email. but he dont respond... sometimes he is to lazy to respond to emails.

[davetech]

Originally Posted by suchenderxxx

my displayboard is dead. and the psu was dead i had a short on the eps 16. But i got it fixed half way now. one of the diodes on the psuboard was dead. psu is working now, only need to fix the displayboard now. I will get a spare soon. Thanks guys for all your response.

thesoniq i wrote him email. but he dont respond... sometimes he is to lazy to respond to emails.

i've delt with him that way too. if money isnt changing hands, he wont help 0.02 worth.
do you get the characters on the display or is it just dead? i have a dead one too but i comp-tested the caps and thats my issue. i bought the caps but i havent installed it yet. if you are havng the same issue," display showing random characters when buttons are pushed" let me know, i will look at mine and see if i could shead more light on your board.


dave

[acreil]

Originally Posted by davetech

display showing random characters when buttons are pushed

That's a self-test mode. It happens when the display microcontroller isn't getting anything from the CPU. It's usually a problem with the cable.

[MarkF48]

ensoniq for a search term....

Service manual, eprom result list | ElektroTanya | Service manuals and repair tips for electronics experts

The EPS is there. Don't know how close it is to the EPS-16, but might help.

[suchenderxxx]

yes mine is also in this self test mode. So it could be such simple as an cable? this would be great... is this a special cable?

[acreil]

Originally Posted by suchenderxxx

this would be great... is this a special cable?

Just try reseating it. The connectors tend to oxidize. When my EPS starts going weird, that's the first thing I do...

[suchenderxxx]

changed the cable with my eps cable and now it works! Great Info here. So i need a new cable but shipping from syntaur.com costs as much as the cable. Could someone tell me which cable is replacement for it? Any PC Cable that could do the job?

[acreil]

I didn't meant to imply that the cable itself is bad. Usually it just needs to be reseated. Try putting the original cable back in. If it doesn't work, you can replace the connectors on the ends. The cable itself is probably fine, unless it's been pinched or cut.

[davetech]

Originally Posted by acreil

That's a self-test mode. It happens when the display microcontroller isn't getting anything from the CPU. It's usually a problem with the cable.

understood but it wasnt the case for mine. i changes cables and the problem still existed. I traced it down to a capacitor. now i have to just change the capacitor

But for some strange reason in go straight to the components level instead of the ribbon cables as the asr10 service manuals suggest. i do check them first though.

Good thing you found the issue.


dave